Svilar denied United again on the half-hour, pushing Romelu Lukaku's low strike behind, but fortune would desert the teenager once again on the brink of half-time.

It leaves United six points clear at the top of Group A with two matches remaining on a night that started with Mourinho taking aim at some of his club's supporters in the programme.

"So for me untouchable in my team and also untouchable in the respect and support he deserves from the fans".

Asked by reporters who he thought the Eagles' most unsafe player was, Bailly said: "There are various players but, in my mind in particular, Pizzi, because he played at Espanyol with me". However, Lukaku hit the post with a strong header in the second-half and his flick on from a long ball from David de Gea fed Martial for the only goal of the game. "What we can not do is play with 12 players, and we can not play with everybody at the same time".

Mourinho rejected the suggestion that Lukaku can be a quiet presence when he is not scoring goals, arguing that the striker gave Tottenham's Toby Alderweireld, Jan Vertonghen and Eric Dier a tough time on Saturday.

One of the reasons why Tottenham have done so well this season despite a plethora of injuries, especially in midfield is Mauricio Pochettino ensuring every player knows the system he wants to employ in every situation.